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Search Results: 1 - 10 of 392889 matches for " Rúbia de Oliveira Molina "
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Populational fluctuation of vectors of Xylella fastidiosa, wells in sweet orange [Citrus sinensis (L.) Osbeck] varieties of northwest Paraná State, Brazil
Molina, Rúbia de Oliveira;Gon?alves, Aline Maria Orbolato;Zanutto, Carlos Alexandre;Nunes, William Mário de Carvalho;
Brazilian Archives of Biology and Technology , 2010, DOI: 10.1590/S1516-89132010000300007
Abstract: the aim of the present study was to assess the population flutuation of the sharpshooters species subfamily cicadellinae belonging to the tribes cicadellini and proconiini, in sweet orange [citrus sinensis( l). osbeck] commercial orchards of the northwest region of paraná state , brazil. samplings were carried out the employing every time 24 yellow sticky cards. identification of the species showed that the most representative were dilobopterus costalimai of the cicadellini tribe and acrogonia citrina of the proconiini tribe.
Análise espa o-temporal da clorose variegada dos citros no Noroeste do Paraná, com uso de PCR para detec o de Xylella fastidiosa = Spatio-temporal analysis of the citrus variegated chlorosis (CVC) in the Northwest of Paraná, using PCR for detection of Xylella fastidiosa
William Mário de Carvalho Nunes,Carlos Alexandre Zanutto,Maria Júlia Corazza- Nunes,Rúbia de Oliveira Molina
Acta Scientiarum : Agronomy , 2006,
Abstract: A citricultura é afetada por inúmeras doen as, como a clorose variegada do citros (CVC), causada pela bactéria Xylella fastidiosa. O objetivo deste trabalho foi determinar a distribui o espacial da doen a dentro de pomares comerciais do Noroeste do Paraná com o uso de métodos moleculares. Foram selecionados pomares sintomáticos para CVC com as variedades ‘Pêra’, ‘Valência’ e ‘Folha Murcha’ (Citrus sinensis Osbeck). Foram marcadas para cada variedade, 4 plantas-referência positivas para CVC (por sintomas e análise molecular) e 8 plantas ao redor de cada uma das plantas-referência foram amostradas, num total de 36 plantas por variedade. Realizou-se o teste da Rea o da Polimerase em Cadeia (PCR) para detec o da bactéria e na mesma época foram conduzidas avalia es visuais de sintomas de CVC. Os resultados da análise temporal, utilizando-se os modelos Monomolecular, Logístico e Gompertz, apontaram o modelo Logístico como o que melhor se ajustou para descrever o comportamento da doen a no tempo, para todas as variedades estudadas. Observou-se que o comportamento espacial da doen a diferiu quando a mesma área foiavaliada pelos métodos visual e molecular, resultando em uma diferen a no padr o espacial das áreas avaliadas. Portanto, ambos os métodos empregados, sintomas e PCR, foram capazes de constatar asmudan as no padr o espacial apresentado, sendo que a análise molecular (PCR) foi mais sensível para detectar as mudan as ocorridas. Countless diseases affect the citriculture, as the citrus variegated chlorosis (CVC) which is caused by the bacteria Xylella fastidiosa.The aim of this work was to determine the space distribution of the disease inside commercial orchards in the Northwest of Paraná, using molecular methods. Symptomatic orchards were selected for CVC with the varieties 'Pêra', 'Valência' and 'Folha Murcha' (Citrus sinensis Osbeck). For each variety, 4 positive reference-plant for CVC (presence of CVC symptoms or molecular analysis by PCR) and 8 plants around of each one reference-plant were evaluated, totaling 36 plants for variety. The detection of the bacteria was conduced by Polimerase Chain Reaction (PCR) technique. Simultaneously, evaluations through visual symptoms of CVC were conducted. The results of the temporal analysis were obtained using the Monomolecular, Logistic and Gompertz models. The Logistic model was the one that best fit to describe the behavior of the disease in the time, for all the studied varieties. Data showed that the space behavior of the disease differed when the same area was evaluated by visual and molecular method
Incidência de Dilobopterus costalimai Young e Acrogonia citrina Marucci & Cavichioli, em pomares cítricos no noroeste paranaense = Incidence of Dilobopterus costalimai Young and Acrogonia citrina Marucci & Cavichioli, in citrus orchards in Northwestern Paraná
Aline Maria Orbolato Gon?alves,Rúbia de Oliveira Molina,William Mário de Carvalho Nunes,Carlos Alexandre Zanutto
Acta Scientiarum : Agronomy , 2008,
Abstract: As cigarrinhas das famílias Cicadellidae e Cercopidae s o vetores da bactéria Xylella fastidiosa Wells, causadora da Clorose variegada dos citros. Esta doen a traz sérios prejuízos à lavoura de citros no Noroeste Paranaense, e é estudada no Brasil desde 1987, quando foi descoberta pela primeira vez na regi o de Colina, S o Paulo. Os vetores transmitem a X. fastidiosa quando se alimentam sugando a seiva do xilema, local onde a bactéria se instala, obstruindo a passagem da seiva. Este trabalho teve o objetivo de avaliar aocorrência das cigarrinhas vetoras Dilobopterus costalimai e Acrogonia citrina em pomar comercial de citros. O experimento foi realizado no sítio “Laranjeiras I”, município de Nova Esperan a, regi o noroeste do Paraná, no período de julho de 2004 a agosto de 2006. Foram feitas amostragens mensais, por meio de armadilhas adesivas amarelas (Biocontrole ), nas variedades de laranjeiras [Citrus sinensis (L.) Osbeck] Folha Murcha, Valência, Pêra e Natal.Nas variedades Pêra e Valência, a cigarrinha mais capturada foi Dilobopterus costalimai. Os meses de maior ocorrência das espécies foram entre dezembro e maio de cada ano. The sharpshooters of the families Cicadellidae and Cercopidae are vectors of Xylella fastidiosa (Wells), which causes citrus variegated chlorosis. This disease causes severe damage to the Paraná citrus industry, and it has been studied in Brazil since 1987, when it was discovered for the first time in the area of Colina, SP. The vectors transmit X. fastidiosa when they feed on the xylem sap, where the bacteria settles, obstructing the passage of the sap. This workhad the objective of evaluating the occurrence of the vector sharpshooter Dilobopterus costalimai and Acrogonia citrina in a commercial citrus orchard during the period between July 2004 and August 2006. The experiment was accomplished in the Laranjeiras I farm, in the city of Nova Esperan a, northwestern Paraná. The collections were undertaken monthly, and yellow stick traps (Biocontrole ) was used as a sampling method in Folha murcha,Valência, Pêra and Natal oranges trees [Citrus sinensis (L.) Osbeck]. In Pêra and Valência trees, the most often captured sharpshooter was Dilobopterus costalimai. The months of higher occurrence of these species were between December and May of each year.
Monitoramento populacional das cigarrinhas vetoras de Xylella fastidiosa, através de armadilhas adesivas amarelas em pomares comerciais de citros
Molina, Rúbia de Oliveira;Nunes, William Mário de Carvalho;Gon?alves, Aline Maria Orbolato;Nunes, Maria Júlia Corazza;Zanutto, Carlos Alexandre;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000700008
Abstract: citrus variegated chlorosis (cvc) is the disease caused by the bacteria xylella fastidiosa wells. dissemination occurs through insect vectors belonging to the order hemiptera, family cicadellidae (subfamily cicadellinae), which transmit the bacteria after feeding on infected plants. the objective of this study was to identify the species of insect vectors in an orchard in the municipality of paranavaí, in the state of paraná. the experiment was conducted in a commercial stand of sweet orange (citrus sinensis (l.) osbeck), pêra variety with 1,000 10-year-old plants. monitoring was performed using yellow sticky traps, distributed in the central and peripheral areas of the orchard with two traps on each one. the stickers were distributed between the 5th and 30th plant in each 10 rows, totaling 20 traps in the orchard and renewed every thirty days during the evaluation period, which was between june 2005 and september 2006. the main species caught were cicadellinae acrogonia citrina marucci & cavichioli dilobopterus costalimai young and macugonalia cavifrons stal. these species occurred constantly, with frequencies of 3.97%, 4.2%, and 13.0% respectively, compared to the total leafhoppers collected.
Nematóides Causadores de Doen as em Frutíferas. = Nematoses which cause diseases in fruit trees.
Claudia R. Dias-Arieira,Rúbia de O. Molina,Alessandra T. Costa
Agro@mbiente On-line , 2008,
Abstract: Nos últimos anos, a fruticultura nacional passou por uma grande expans o, dentre os fatores que contribuíram para o aumento na área cultivada cita-se as condi es climáticas favoráveis, que permitem produzir praticamente todos os tipos de frutas. No entanto, as frutíferas podem apresentar, ao longo do seu desenvolvimento e produ o, diversos problemas fitossanitários, dentre eles o parasitismo por nematóides. Nematóides s o importantes parasitos de plantas e encontram-se disseminados por todas as áreas nas quais a agricultura é explorada. Praticamente todas as espécies cultivadas s o suscetíveis a esses patógenos, incluindo as frutíferas. No Brasil, há relato de 70 espécies de nematóides que atacam essas espécies. A fauna nematológica na rizosfera e no rizoplano de uma dessas plantas é bastante diferenciada e complexa, com algumas espécies de nematóides apresentando alta capacidade de reprodu o, o que pode, ao longo do tempo, causar declínio da planta e redu o na vida útil do pomar. Neste contexto, este trabalho teve como objetivo fazer uma abordagem geral em rela o aos nematóides associados às principais frutíferas cultivadas no Brasil.= National fruit growing has spread a great deal in the past years. Favorable climate conditions which make growing basically every kind of fruit possible are among the aspects contributing to the increase of the crop area. However, fruit may present a number of phytosanitary problems throughout its development and growing such as parasite nematodes. Nematodes are important plant parasites disseminated in areas where agricultural areas. Practically all of the growing species are susceptible to these pathogens, including fruit. In Brazil, there is the report of 70 nematode species which attack fruit species. Nematode fauna inside the rhizosphere and the rhizoplane of these plants is much differentiated and complex, with some species of nematodes presenting high reproduction capacity, what may, in the long run, cause decline of the plant and the reduction of the lifetime of the orchard. Thus, this paper overviews the nematodes associated with the main fruit grown in Brazil.
Intense rainfalls prediction models for the state of Mato Grosso, Brazil
Luiz Fernando Coutinho de Oliveira,Marcelo Ribeiro Viola,Sidney Pereira,Nara Rúbia de Morais
Ambiente e água : An Interdisciplinary Journal of Applied Science , 2011,
Abstract: Rain intensity data are necessary to increase security of hydraulic projects. The objective of this study was to determine the relationships among intensity-duration-frequency (IDF) and Bell’s model for the State of Mato Grosso, Brazil. The equations were obtained by disaggregation of 24 h rainfall data from 136 rain stations available in the National Water Agency (ANA) data base. Employing Gumbel distribution, the rainfalls were estimated for each time duration and for the return periods of 2, 5, 10, 25, 50 and 100 years, and thereafter for each season. The coefficients of IDF relationships and Bell’s models were adjusted by the minimum square method, for all seasons evaluated. The coefficients of determination and Willmott agreement index exceeded 0.98 and 0.85, respectively, for all stations, which classifies the adjustment of the rainfall models as great.
EFEITO DE PRODUTOS QUíMICOS E NATURAIS SOBRE A POPULA O DE NEMATóIDE Pratylenchus brachyurus NA CULTURA DA CANA-DE-A úCAR EFFECT OF NATURAL AND CHEMICAL PRODUCTS ON Pratylenchus brachyurus POPULATION IN SUGARCANE
bia Silva de Oliveira,Mara Rúbia da Rocha,Américo José dos Santos Reis,Valéria de Oliveira Faleiro Machado
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v35i3.2219
Abstract: Com o objetivo de avaliar o efeito de produtos químicos e naturais sobre a popula o do nematóide Pratylenchus brachyurus, na cultura da cana-de-a úcar (Saccharum sp.), cv. RB 835486, esta pesquisa foi conduzida na Escola de Agronomia e Engenharia de Alimentos, da Universidade Federal de Goiás, em Goiania, GO, e nos campos experimentais da Usina Jalles Machado S/A, em Goianésia, GO. O delineamento experimental foi o de blocos completos casualizados, em esquema fatorial 5 x 2, com cinco repeti es. Os dez tratamentos avaliados foram testemunha, abamectina 0,5 L.ha-1, abamectina 1,0 L.ha-1, óleo de nim 2,0 L.ha-1, aldicarb 150G 12 kg.ha-1, todos com e sem aplica o de torta de filtro (30 t.ha-1). Avalia es da popula o de P. brachyurus foram feitas aos dois, quatro, seis e oito meses após o plantio, além da avalia o de produtividade ao final do primeiro corte. Os tratamentos tiveram efeito significativo aos dois, quatro e seis meses após o plantio, sendo que, somente o produto aldicarb apresentou eficiência, reduzindo a popula o do nematóide. Abamectina e oléo de nim n o apresentaram efeito nematicida consistente, mostrando, algumas vezes popula es do nematóide maiores do que a testemunha. Efeito significativo da torta de filtro sobre a redu o da popula o de P. brachyurus apenas foi observado aos seis meses após o plantio, embora em termos de produtividade as parcelas que receberam torta de filtro apresentaram incremento médio de 10 t.ha-1. PALAVRAS-CHAVE: Fitonematóides; Azadirachta indica; controle; torta de filtro. The objective of this research was to evaluate the effect of natural and chemical products on Pratylenchus brachyurus population in sugarcane crop, cv. RB 835486.This study was conducted at ";Escola de Agronomia e Engenharia de Alimentos"; of ";Universidade Federal de Goiás";, in Goiania, and at experimental fields of ";Usina Jalles Machado S/A";, in Goianésia, Goiás State, Brazil. The experimental design was randomized blocks, in a 5 x 2 factorial scheme, with five replications. The ten treatments were the arrangement of the nematicide abamectim 0.5 L.ha-1, abamectim 1.0 L.ha-1, neem oil, 2.0 L.ha-1, aldicarb 150G 12 kg.ha-1 and control, all with and without filter cake (30 t.ha-1). The population of P. brachyurus was evaluated at two, four, six and eight months after planting. The yield of sugarcane was also evaluated at the end of the first harvest. Effect of treatments on nematode population was observed two, four and six months after planting, but only aldicarb treatment showing efficiency to reduce nematode population. Abamectim
Ambulatório de apoio ao tabagista no Ceará: perfil dos pacientes e fatores associados ao sucesso terapêutico
Sales, Maria Penha Uchoa;Figueiredo, Mara Rúbia Fernandes de;Oliveira, Maria Irenilza de;Castro, Helano Neiva de;
Jornal Brasileiro de Pneumologia , 2006, DOI: 10.1590/S1806-37132006000500007
Abstract: objective: to evaluate patient profiles and factors associated with successful treatment. methods: a retrospective study of patients enrolled in the smoking cessation program at the hospital de messejana, located in the state of ceará, brazil, from october of 2002 to april of 2005. the treatment was evaluated based on patient profile, type of medication prescribed and time on that medication. results: of the 320 patients enrolled, 65.5% were women. the mean age at the outset of treatment was 48 years, and the mean duration of the smoking habit was 33 years. more than 90% of the patients had started smoking before the age of 20. of the 258 individuals who had enrolled in the program at least one year prior, 50.8% had achieved treatment success; 17.8% had relapsed, and 31.4% had not quit smoking. on average, partial success was achieved in the fifth week of the treatment, and relapse occurred predominantly in the fourth month. approximately 60% of the patients were treated with medication. conclusion: quitting smoking was significantly associated with the use of medication, regardless of the profile of the smoker evaluated. in the second year of the program, quitting smoking was more strongly associated with the use of bupropion and nicotine replacement, resulting in a higher success rate and a trend toward a reduction in the relapse rate.
Capture and utilization of the Antillean manatee (Trichechus manatus manatus) on the northern Brazilian coast
bia de Oliveira Luna,Janaina Pauline de Araújo,Régis Pinto de Lima,Marisol Menezes Pessanha
Biotemas , 2008,
Abstract: The Antillean manatee (Trichechus manatus manatus) is now considered to be the most endangered aquatic mammal of Brazil. During 1992 and 1993, we surveyed 3000km of the coastal area of the Maranh o (MA), Pará (PA) and Amapá (AP) states where we visited 145 localities and performed 262 interviews aiming to identify the hunting pressure on the species, and how the population actually uses the manatees hunted on the Brazilian north coast. The people interviewed were involved in fishing activities, preferably those who hunted manatees. Catches followed by intentional killing were responsible for 94.07% of the cases of mortality, while animals stranded on the beach represented 5.93% of the cases. Intentional capture was the strongest factor in the manatee mortality, and hunting with a harpoon occurred in 86.38% of catches. After capture, the animals were used for the hunter’s subsistence (63.83%) and human consumption and trading (30.64%), and the animals’ parts were used for diverse purposes (medicine, fetish and santerias). It was considered that a proper understanding of the communities’ customs concerning the animals was important for any proposal of conservation strategies.
Flutua??o populacional de cigarrinhas vetoras de Xylella fastidiosa Wells et al. em pomares comerciais de citros no noroeste do Paraná
Nunes, William M.C.;Molina, Rúbia de O.;Albuquerque, Fernando A. de;Corazza-Nunes, Maria J.;Zanutto, Carlos A.;Machado, Marcos A.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000200012
Abstract: the citrus variegated chlorosis (cvc), an important disease of citrus in brazil, is caused by the bacterium xylella fastidiosa wells et al. and transmitted by xylem-feeding sharpshooters (hemiptera: cicadellidae). this study evaluated the fluctuation of populations of species of sharpshooters belonging to the tribes cicadellini and proconiini, from subfamily cicadelinae, in a commercial sweet orange [citrus sinensis (l.) osb.] grove, located in the northwest region of paraná state, brazil, in four varieties: valência, natal, pêra, and folha murcha. sharpshooters population was monitored using yellow stick traps sampled at 15 day-intervals, in 24 traps, from november of 1999 to march of 2004. the most abundant species were dilobopterus costalimai young (tribe cicadellini) and acrogonia citrina marucci & cavichioli (tribe proconiini). both species were detected during the complete period studied, which is important because they have great potential for transmitting cvc. thus, since more than a sharpshooter species were detected, more efforts are recommended to monitor and control these insects in citrus groves, aiming to reduce the dissemination of cvc.
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